| /******************************************************************************* |
| * Copyright (c) 2008, 2010 Matthew Hall and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Matthew Hall - initial API and implementation (bug 194734) |
| * Matthew Hall - bug 195222 |
| ******************************************************************************/ |
| |
| package org.eclipse.core.databinding.property.list; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.eclipse.core.databinding.observable.Diffs; |
| import org.eclipse.core.databinding.observable.IObservable; |
| import org.eclipse.core.databinding.observable.Realm; |
| import org.eclipse.core.databinding.observable.list.IObservableList; |
| import org.eclipse.core.databinding.observable.list.ListDiff; |
| import org.eclipse.core.databinding.observable.masterdetail.IObservableFactory; |
| import org.eclipse.core.databinding.observable.masterdetail.MasterDetailObservables; |
| import org.eclipse.core.databinding.observable.value.IObservableValue; |
| import org.eclipse.core.databinding.property.value.IValueProperty; |
| import org.eclipse.core.internal.databinding.property.ListPropertyDetailValuesList; |
| |
| /** |
| * Abstract implementation of IListProperty. |
| * |
| * @since 1.2 |
| */ |
| public abstract class ListProperty implements IListProperty { |
| /** |
| * @since 1.3 |
| */ |
| public final List getList(Object source) { |
| if (source == null) { |
| return Collections.EMPTY_LIST; |
| } |
| return Collections.unmodifiableList(doGetList(source)); |
| } |
| |
| /** |
| * Returns a List with the current contents of the source's list property |
| * |
| * @param source |
| * the property source |
| * @return a List with the current contents of the source's list property |
| * @noreference This method is not intended to be referenced by clients. |
| * @since 1.3 |
| */ |
| protected List doGetList(Object source) { |
| IObservableList observable = observe(source); |
| try { |
| return new ArrayList(observable); |
| } finally { |
| observable.dispose(); |
| } |
| } |
| |
| /** |
| * @since 1.3 |
| */ |
| public final void setList(Object source, List list) { |
| if (source != null) { |
| doSetList(source, list); |
| } |
| } |
| |
| /** |
| * Updates the property on the source with the specified change. |
| * |
| * @param source |
| * the property source |
| * @param list |
| * the new list |
| * @since 1.3 |
| * @noreference This method is not intended to be referenced by clients. |
| */ |
| protected void doSetList(Object source, List list) { |
| doUpdateList(source, Diffs.computeListDiff(doGetList(source), list)); |
| } |
| |
| /** |
| * @since 1.3 |
| */ |
| public final void updateList(Object source, ListDiff diff) { |
| if (source != null) { |
| doUpdateList(source, diff); |
| } |
| } |
| |
| /** |
| * Updates the property on the source with the specified change |
| * |
| * @param source |
| * the property source |
| * @param diff |
| * a diff describing the change |
| * @since 1.3 |
| */ |
| protected void doUpdateList(Object source, ListDiff diff) { |
| IObservableList observable = observe(source); |
| try { |
| diff.applyTo(observable); |
| } finally { |
| observable.dispose(); |
| } |
| } |
| |
| public IObservableList observe(Object source) { |
| return observe(Realm.getDefault(), source); |
| } |
| |
| public IObservableFactory listFactory() { |
| return new IObservableFactory() { |
| public IObservable createObservable(Object target) { |
| return observe(target); |
| } |
| }; |
| } |
| |
| public IObservableFactory listFactory(final Realm realm) { |
| return new IObservableFactory() { |
| public IObservable createObservable(Object target) { |
| return observe(realm, target); |
| } |
| }; |
| } |
| |
| public IObservableList observeDetail(IObservableValue master) { |
| return MasterDetailObservables.detailList(master, listFactory(master |
| .getRealm()), getElementType()); |
| } |
| |
| public final IListProperty values(IValueProperty detailValue) { |
| return new ListPropertyDetailValuesList(this, detailValue); |
| } |
| } |